executor = newFixedThreadPool(nThreads < 1 ? 1 : nThreads);
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        maxDeleteDocumentCacheSize = fessConfig.getIndexerDataMaxDeleteCacheSizeAsInteger();
        maxRedirectCount = fessConfig.getIndexerDataMaxRedirectCountAsInteger();
    }

    protected ExecutorService newFixedThreadPool(final int nThreads) {

  }

  @J2ktIncompatible
  @GwtIncompatible // blocking wait
  public void testRunIdempotency() throws Exception {
    final int numThreads = 10;
    final ExecutorService executor = Executors.newFixedThreadPool(numThreads);
    for (int i = 0; i < 1000; i++) {
      final AtomicInteger counter = new AtomicInteger();
      final TrustedListenableFutureTask<Integer> task =
          TrustedListenableFutureTask.create(

      cache.getUnchecked(s);
      expectedKeys.add(s);
    }
    computationShouldWait.set(true);

    final AtomicInteger computedCount = new AtomicInteger();
    ExecutorService threadPool = Executors.newFixedThreadPool(nThreads);
    final CountDownLatch tasksFinished = new CountDownLatch(nTasks);
    for (int i = 0; i < nTasks; i++) {
      final String s = "a" + i;

import static com.google.common.graph.TestUtil.assertStronglyEquivalent;
import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.Executors.newFixedThreadPool;
import static org.junit.Assert.assertThrows;

import com.google.common.collect.ImmutableList;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.CyclicBarrier;

import static com.google.common.graph.TestUtil.assertStronglyEquivalent;
import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.Executors.newFixedThreadPool;
import static org.junit.Assert.assertThrows;

import com.google.common.collect.ImmutableList;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.CyclicBarrier;

    final ConcurrentHashMultiset<String> multiset = new ConcurrentHashMultiset<>(map);
    int nThreads = 20;
    int tasksPerThread = 10;
    int nTasks = nThreads * tasksPerThread;
    ExecutorService pool = Executors.newFixedThreadPool(nThreads);
    ImmutableList<String> keys = ImmutableList.of("a", "b", "c");
    try {
      List<Future<int[]>> futures = Lists.newArrayListWithExpectedSize(nTasks);
      for (int i = 0; i < nTasks; i++) {

                "hand");
        Iterator<String> lyrics = stringList.iterator();

        ExecutorService executor = Executors.newFixedThreadPool(10);
        CompletionService<ProjectSegment> service = new ExecutorCompletionService<>(executor);

        List<Future<ProjectSegment>> futures = new ArrayList<>();

  @GwtIncompatible // concurrency
  private void runConcurrentTest(int numberOfThreads, final Callable<@Nullable Void> callable)
      throws Exception {
    ExecutorService executorService = Executors.newFixedThreadPool(numberOfThreads);
    final CountDownLatch startLatch = new CountDownLatch(numberOfThreads);
    final CountDownLatch doneLatch = new CountDownLatch(numberOfThreads);
    for (int i = numberOfThreads; i > 0; i--) {

    final ConcurrentHashMultiset<String> multiset = new ConcurrentHashMultiset<>(map);
    int nThreads = 20;
    int tasksPerThread = 10;
    int nTasks = nThreads * tasksPerThread;
    ExecutorService pool = Executors.newFixedThreadPool(nThreads);
    ImmutableList<String> keys = ImmutableList.of("a", "b", "c");
    try {
      List<Future<int[]>> futures = Lists.newArrayListWithExpectedSize(nTasks);
      for (int i = 0; i < nTasks; i++) {

                + "class java.lang.RuntimeException\\]\\]");
  }

  public void testCompletionFinishesWithDone() {
    ExecutorService executor = Executors.newFixedThreadPool(10);
    for (int i = 0; i < 50000; i++) {
      final AbstractFuture<String> future = new AbstractFuture<String>() {};
      final AtomicReference<String> errorMessage = Atomics.newReference();
      executor.execute(